$27.99 YFTK Stratum Zero Style 18650/21700 316SS Mod 23mm/26mm
The most prominent feature of the device is reflected in a special Mosfet created by OLC team, being developed by military forces. User can have maximum protection on all the aspects of its usage: protection from reverse polarity, battery discharge 2.65 volts, sticking the button, and short circuit protection.Features
Mosfet installed;
Side button;
Reverse polarity protection;
Short circuit protection;
Compatiable with 18650/21700 battery